WO2017198730A1 - Spunbonded fabric of endless filaments - Google Patents
Spunbonded fabric of endless filaments Download PDFInfo
- Publication number
- WO2017198730A1 WO2017198730A1 PCT/EP2017/061877 EP2017061877W WO2017198730A1 WO 2017198730 A1 WO2017198730 A1 WO 2017198730A1 EP 2017061877 W EP2017061877 W EP 2017061877W WO 2017198730 A1 WO2017198730 A1 WO 2017198730A1
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- WIPO (PCT)
- Prior art keywords
- lubricant
- filaments
- spunbonded
- ppm
- component
- Prior art date
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
- D04H3/147—Composite yarns or filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
- D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
Definitions
- the invention relates to a spunbonded nonwoven of continuous filaments of thermoplastic material, wherein the filaments are formed as Mehrkomponentenfila- elements, in particular as bicomponent filaments with core-shell configuration.
- the spun-bonded non-wovens have filaments on their ends.
- Such continuous filaments differ because of their quasi-endless length of staple fibers having much smaller lengths of, for example, 10 to 60 mm.
- Spun nonwovens of the type mentioned are known from practice in different loanable variants. In such spunbonded fabrics, a high strength or high tensile strength is generally desirable. For many applications, the spunbonded nonwovens should also have a smooth, soft feel. A soft grip of the spunbonded fabric on the one hand and a high strength or tensile strength of the spunbonded fabric on the other hand is often not satisfactorily achievable in the combination. Above all, a soft grip can not be realized simultaneously with a high productivity or plant productivity.
- Polypropylene spunbonded nonwovens have long been known and are characterized by a good running behavior on the associated system. In particular, relatively few soiling occur. However, these spunbonded fabrics are not particularly soft and the possibilities for improving the softness - for example, through finer fibers - are limited and often not economical.
- the use of a lubricant to increase the softness of the spunbond web is possible but does not alter the relatively high flexural stiffness of the filaments and thus can not provide a satisfactory soft spunbonded web.
- the use of such a lubricant has the disadvantage that the lubricant during the spinning process from the
- Filament melt or diffused out of the initially hot filaments and polluted the system, so that the productivity is ultimately lowered.
- polypropylene blends have been introduced, for example blends of homo-polypropylene and polypropylene-based copolymers, such as "Random CoPP.” These blends give pliable filaments, which, however, tend to have a rather blunt grip, which in turn These soft polypropylene blends have disadvantageously reduced strength, and the problems of soiling described above are also present here:
- homo-polypropylene improves core strength and soft polypropylene blends or the use of polypropylene copolymer in the shell increase the softness of the filaments or spunbonded web relatively dull. This requires the use of a lubricant, which in turn brings the above-mentioned problems associated with contamination with it.
- the invention is the technical problem of specifying a spunbonded fabric of the type mentioned above, that is characterized both by a smooth soft grip as well as by a sufficient strength, which is simple and efficient to produce and in particular a evaporation of plasticizing additives or evaporation of lubricants can be largely avoided.
- the invention according to a first embodiment (A) teaches a spunbonded nonwoven fabric made of thermoplastic material, the filaments being multi-component filaments, in particular bicomponent filaments, having core-shell-type filaments.
- the filaments contain at least one lubricant, wherein the lubricant is present exclusively or at least 90 wt .-%, preferably at least 95 wt .-% in the core component, wherein the mass ratio between the core component and the shell component 40:60 to 90:10, preferably 60:40 to 85:15, preferably 65:35 to 80:20 and particularly preferably 65:35 to 75:25.
- the proportion of the lubricant corresponds - based on the total filament - 250 to 5500 ppm, preferably 500 to 5000 ppm, preferably 700 to 3000 ppm and more preferably 700 to 2500 ppm.
- the mass ratio between the core component and the sheath component in the first embodiment is 67:33 to 73:27 and preferably 70:30 or about 70:30.
- the invention further teaches according to a first embodiment (B) a spunbond of continuous filaments of thermoplastic material, wherein the continuous filaments are formed as Mehrkompen- nentenfilêt, in particular as bicomponent filaments, with core-sheath configuration, wherein the filaments at least one Lubricants containing, wherein the proportion of the lubricant - based on the total filament - 250 to 5500 ppm, preferably 500 to 5000 ppm, preferably 700 to 3000 ppm and very preferably 700 to 2500 ppm, wherein the lubricant exclusively or at least 90 wt.
- the surface of the spunbonded fabric in the period up to 150 minutes after the spunbonding production is harder, in particular by more than 3%, preferably by at least 3.2%, is preferably at least 3.3% and in particular at least 3.5% harder than the surface of a s Comparative spunbonded fabric, otherwise prepared under the same conditions, with homogeneous distribution of the lubricant with respect to the filament cross-section and with the surface
- the mass ratio between the core component and the sheath component is 40:60 to 90:10, suitably 60:40 to 85:15, in particular 65:35 to 80:20, preferably 65:35 to 75 : 25 and very preferably 67:33 to 73:27.
- first embodiment of the invention teachings of the two claims 1 and 2 are here and hereinafter referred to as the first embodiment of the invention and the teaching according to claim 1 as the first embodiment A and the teaching according to claim 2 referred to as the first embodiment B.
- first embodiment B teaching according to claim 2
- both the first embodiment A and the first embodiment B are meant.
- the shell component is formed lubricant-free or substantially free of lubricant.
- the jacket can serve as a migration brake for the lubricant present in the core.
- the invention further teaches according to a second embodiment (A) a spunbond of continuous filaments of thermoplastic material, wherein the filaments are formed as Mehrkomponen- tenfilêt, in particular as bicomponent filaments, with core-sheath configuration, wherein the filaments at least one Lubricants containing, wherein the proportion of the lubricant - based on the total filament - 250 to 5500 ppm, preferably 500 to 5000 ppm, preferably 700 to
- the invention for solving the technical problem according to a second embodiment (B) teaches a spunbond of continuous filaments of thermoplastic material, wherein the filaments are formed as Mehrkomponen- tenfilêt, in particular as bicomponent filaments, with core-sheath configuration, the filaments containing at least one lubricant, wherein the proportion of the lubricant - based on the total filament - 250 to 5500 ppm, preferably 500 to 5000 ppm, preferably 700 to 3000 ppm and very preferably 700 to 2500 ppm, wherein the lubricant is preferably present in the shell component wherein the shell component contains at least one additive which reduces the migration speed of the lubricant through the shell component, the surface of the spunbond being harder over a period of up to 150 minutes after spunbonding, in particular by more than 3%, preferably by at least 3, 2%, preferably at least at least 3.3% and in particular at least 3.5% harder than the surface of a comparison spunbond fabric otherwise prepared under the same conditions
- the selected period up to 150 min. On the one hand, it is adapted to the measuring device described below and, incidentally, it also takes into account typical times from which the jumbo rolls can be rolled over. A hardness measurement directly in the course of spinning is not possible with the chosen method. It is within the scope of the invention that such a measurement about 15 min. lasts and therefore can not run continuously. However, the mentioned period can not be too long so that it can still serve as a decision-making aid during production. Overall, this period allows the decision regarding the spinning behavior (system cleanliness) and the winding behavior.
- the mass ratio between the core component and the shell component is expediently 40:60 to 90:10, preferably 60:40 to 85:15, in particular 65:35 to 80:20, preferably 65: 35 to 75:25 and most preferably 67:33 to 73:27.
- the degree of hardness of the spunbonded web (see in particular claims 2 and 5) on the nonwoven surface by means of a TSA measuring device (Emtec, Leipzig, Germany) as the volume at the peak maximum of the volume / frequency spectrum at about 6550 Hz is determined.
- This TSA gauge expresses the product characteristic as "TS7.”
- the TS7 value correlates with the softness of the nonwoven A spunbonded web of rough / blunt filaments has a higher TS7 value than a comparable spunbond of smoother / softer filaments.
- the measurement of the degree of hardness or of the volume in the period up to 150 minutes after spunbonding is effected on the surface of the spunbonded nonwoven fabric
- the measurement thus takes place within the period of up to 150 minutes after deposition of the filaments on the support or on the support belt conveyor It is within the scope of the invention that this measurement takes place after all pre-consolidation and / or solidification measures which are carried out on the Nonwoven - in particular on the shelf or on the filament filter belt - this is in particular also egg solidification by means of a calender with a gravure roll.
- the measurement of the degree of hardness is thus carried out after these solidifications, but with the proviso that it is carried out in a period of up to 150 minutes after filing of the filaments on the tray or on the Ablagesiebband.
- the degree of hardness is measured with a commercially available measuring device TSA (Tissue Softness Analyzer) from Emtec, Leipzig, Germany.
- TSA tissue Softness Analyzer
- the non-woven sample or the rotor is excited to vibrations / noises and a microphone records this reaction.
- the measured noises are measured using Fourier
- the volume of the local maximum volume in the range of around 6550 Hz is output by the meter as "TS7.”
- This sound frequency spectrum depends on the overall structure of the nonwoven surface and the amplitude of the volume depends, among other things, on the height of the nonwoven structure and on the degree of hardness Characteristics such as surface topology in the range below 1000 Hz and the softness in the range of 6550 Hz.
- the TS7 value is a characteristic measurement of the degree of hardness within the scope of the invention - in particular in the context of the teaching of the claims and 5. The percentages given there for differences in the degree of hardness thus relate to this value
- Comparative nonwoven set equal to 100% and it is determined in relation to the volume or the degree of hardness of the spunbonded nonwoven invention, the percentage deviation.
- a description of such a measurement method for the degree of hardness or for the degree of softness is also found in "Schryer U., Bruers T., Schollmeyer E., Gutmann J .: Handle assessment of textiles by means of sound analysis, Melliand Textilberichte 1/2012, 43 bis 45 ".
- the filaments are preferably deposited on a tray, in particular on a filing screen belt. It is within the scope of the invention that the measurement of the degree of hardness on the surface of the spunbonded non-woven, which faces away from the tray or the Ablagesiebband. If the nonwoven web or the spunbonded nonwoven is solidified by means of a calender with gravure roll, the measurement of the degree of hardness is expediently carried out on the surface of the spunbonded nonwoven which faces the gravure roll and is preferably the surface of the spunbonded nonwoven web or facing away from the storage screen belt.
- the spunbonded nonwoven on the one hand and the comparative nonwoven on the other hand are produced under the same conditions, in particular produced with the same system or spunbond system, and are deposited on the same tray or the same filing screen belt. Furthermore, it is within the scope of the invention that the spunbonded fabric on the one hand and the comparative nonwoven fabric on the other are solidified in the same way, in particular solidified with the same calender or the like, and that the filaments of the spunbond fabric on the one hand and the comparison fabric on the other hand have the same denier.
- Raw material mixtures which are preferably compatible in each case can be used in the core component and / or in the shell component.
- Core-sheath configuration means in the context of the invention that the sheath component completely or substantially completely surrounds the core component.
- the continuous filaments of the spunbonded fabric preferably have for all embodiments of the invention a titer of 1.0 to 2.5 denier and more preferably a titer of 1.2 to 2.2 denier. It is within the scope of the invention - in particular in the context of embodiments B - that it may be in the core-shell configuration to an eccentric core-shell configuration. Preferably then results by suitable choice of raw materials or plastic components, a spiral-crimped filament.
- the core component and / or the shell component at least 90 wt .-%, preferably at least 95 wt .-% and preferably at least 96 wt .-% of at least one component from the group "polyolefin, poly olefin copolymer, mixture of polyolefin and polyolefin copolymer.
- the core component and / or the sheath component at least 90 wt .-%, preferably at least 95 wt .-%, and preferably at least 96 wt .-% at least one component from the group "polypropylene, polypropylene copolymer, mixture of polypropylene and polypropylene copolymer" has.
- the core component and / or the shell component consists essentially of a polyolefin and / or substantially of a polyolefin copolymer and / or substantially of a mixture of polyolefin and polyolefin copolymer.
- Variant of the first and second embodiment consists / consist of the core component and / or the shell component substantially of a polypropylene and / or substantially of a polypropylene copolymer and / or substantially of a mixture of a polypropylene and a polypropylene copolymer.
- the restriction "essentially” in the embodiment variants described above takes account of the fact that additives, in particular the lubricant and, if appropriate, an additive which reduces the migration speed of the lubricant, are / are contained in the core component and / or shell additive Proportion of the additives (lubricant, optionally the migration rate of the lubricant reducing additive and any other additives, such as color additives) - based on the total filament - a maximum of 10 wt .-%, preferably at most 8 wt .-%, preferably at most 6 wt.
- the polypropylene copolymer used in the context of the invention is, moreover, designed as an ethylene-propylene copolymer according to an expedient embodiment 1 to 6%, preferably from 2 to 6%. It is recommended that the preferably used polypropylene copolymer have a melt flow rate (MFI) of 19 to 70 g / min, in particular from 20 to 70 g / min, preferably from 25 to 50 g / min. It has been found that the polypropylene copolymer has a molecular weight distribution or molecular weight distribution (M w / M n ) of from 2.5 to 6, preferably from 3 to 5.5 and very preferably from 3.5 to 5.
- MFI melt flow rate
- a recommended embodiment of the first and the second embodiment of the invention is characterized in that the core component consists essentially of a homo-polyolefin, in particular substantially of a homo-polypropylene. It has been proven that the core com-
- component has at least 80 wt .-%, preferably at least 85 wt .-%, preferably at least 90 wt .-% and particularly preferably at least 95 wt .-% of homo-polyolefin, in particular homo-polypropylene.
- a recommended embodiment of the first and second embodiments is further characterized in that the sheath component consists essentially of a polyolefin copolymer, in particular substantially of a polypropylene copolymer and / or substantially of a mixture of a polyolefin or homo-polyolefin with a polyolefin copolymer, in particular substantially consisting of a mixture of a polypropylene or homopolymer polypropylene with a polypropylene copolymer.
- the substances specified below are preferably used as lubricants. It is expedient to use at least one fatty acid derivative and preferably at least one substance from the group "fatty acid ester, fatty acid alcohol, fatty acid amide.”
- a recommended embodiment of the invention is characterized in that as lubricant at least one stearate - in particular glycerol monostearate - and / or a
- lubricant masterbatch used in accordance with a proven embodiment is the erucic acid amide product SL05068PP from Constab First embodiment A or B:
- the mass ratio between the core component and the shell component is suitably 40:60 to 90:10, and preferably 67:33 to 75:25.
- the at least one lubricant be admixed only with the core component or the lubricant be present at least 95% by weight, preferably at least 98% by weight, in the core component. It is recommended that in this embodiment variant in the entire continuous filament, a proportion or an average proportion of the lubricant from 250 to 5000 ppm and preferably from 1000 to 5000 ppm are present.
- a further embodiment variant of the first embodiment of the invention is characterized in that the core component consists of a homo-polyolefin, in particular a homo-polypropylene, or consists essentially and that the shell component consists of a mixture of a homo-polyolefin, in particular a homo-polypropylene.
- Polypropylene and from a polyolefin copolymer, in particular a polypropylene copolymer consists or consists essentially.
- the proportion of the polyolefin copolymer or polypropylene copolymer in the sheath component is expediently from 50 to 10% by weight, preferably from 30 to 10% by weight and preferably from 25 to 15% by weight (based on the sheath component).
- the polyolefin copolymer used here, in particular the polypropylene copolymer have a melt flow rate (MFI) of 5 to 30 g / 10 min, preferably of 5 to 25 g / 10 min.
- the melt flow rate (MFI) is measured in the context of the invention, in particular according to ISO 1 133 and that for polypropylene and polypropylene copolymer at 230 ° C and 2.16 kg.
- the polyolefin copolymer or the polypropylene copolymer preferably has an ethylene content of from 2 to 20%, preferably from 4 to 20%.
- the polyolefin copolymer or the polypropylene copolymer of this embodiment is preferably characterized by an average C2 content in the range from 2 to 6% with respect to the carbon atoms.
- the polypropylene copolymer used is preferably Exxon Vistamaxx 3588 and / or Exxon Vistamaxx 6202 or a polypropylene having similar properties.
- the polypropylene copolymer is mixed as described above with the homo-polyolefin or homo-polypropylene for the shell component. Preferred data for the homo-polypropylene are listed below.
- thermoplastic used In the course of the production of the spunbonded nonwoven according to the invention, it is possible to work with a recyclate recirculation with regard to the thermoplastic used. It is expedient - especially in the first embodiment of the invention - the recycled stream used exclusively or primarily for the core component. A recirculated recyclate loaded with lubricant is then returned only to the core component and it is ensured that the shell component is lubricated.
- the at least one lubricant is present exclusively or for the most part in the core component.
- the second embodiment of the invention will be explained in more detail.
- a variant of the second embodiment A of the invention is characterized in that the lubricant is present in the jacket component and according to an embodiment of the invention is contained only in the shell component.
- lubricants may also be present in or even only in the core component.
- lubricant is preferably present in the shell component.
- the lubricant may be contained only in the shell component.
- lubricant can also be present in the core component.
- the core component may consist of a homo-polyolefin and in particular of a homo-polypropylene or consist essentially.
- the core component in this second embodiment at least 75 wt .-%, preferably at least 80 wt .-%, preferably at least 85 wt .-% and particularly preferably at least 90 wt .-% of the homo-polyolefin, in particular the homo Polypropylene on.
- Lubricant-containing shell component consists of a polyolefin copolymer, in particular of a polypropylene copolymer or substantially consists. It should be noted that in the shell component, the lubricant may be contained or contained and (additionally) of the migration rate of the lubricant reducing additive is included.
- a polyolefin copolymer or a polypropylene copolymer is preferably selected for the shell component, which has a melt flow rate (MFI) of 20 to 70 g / 10 min, preferably from 25 to 50 g / 10 min.
- MFI melt flow rate
- an ethylene-propylene copolymer is used with an ethylene content of 1 to 6%, preferably from 2 to 6%.
- the polyolefin copolymer or polypropylene copolymer chosen for the sheath component is characterized by a narrow molecular weight distribution and preferably by a molecular weight distribution or molecular weight distribution (M w / M n ) of from 2.5 to 6, preferably from 3 to 5.5 and very preferably from 3.5 to 5.
- M w / M n molecular weight distribution or molecular weight distribution
- the molecular weight distribution M w / M n is determined by gel permeation chromatography (GPC) in accordance with ISO 16014-1: 2003, ISO 16014-2: 2003, ISO 16014-4: 2003 and ASTM D 6474-12.
- a random polypropylene copolymer such as Borealis RJ377MO or Basell Moplen RP24R having a nucleating agent or otherwise modified for a high crystallization rate be used.
- This latter random polypropylene copolymer has z. B. a melt flow rate of 30 g / 10 min and a Vicat temperature of 120 ° C (ISO 306 / A50, 10 N).
- At least one additive which reduces the migration speed of the lubricant is used in the shell component of the endless filaments.
- This additive is at least one nucleating agent and / or at least
- the nucleating agent in a proportion of 500 to 2500 ppm - based on the total filament - contained in the filaments.
- a nucleating agent a sorbitol such as dibenzyl sorbitol (DBS) or 1, 3: 2,4-bis (p-methylbenzylidene) sorbitol (MDBS) or the 1, 3: 2,4-bis (3,4-Dimethylbenzylidene) sorbitol (DMDBS)
- a preferred nucleating agent is a salt of an aromatic carboxylic acid, in particular an alkali metal salt of benzoic acid and, for example, sodium benzoate.
- the migration speed of the lubricant in the shell is lowered and thus with regard to the solution of the technical problem the problem-free use of lubricants in the sheath component allows.
- at least one filler in the shell component can reduce the migration speed of the lubricant.
- the filler used is preferably at least one metal salt and particularly preferably at least one substance from the group "titanium dioxide", calcium carbonate, talcum ".
- random polypropylene copolymers having a narrow molar mass distribution can expediently be used as polypropylene copolymers for the shell component.
- Polypropylene copolymers which are known from the injection molding sector and often contain antistatic agents and nucleating agents are also suitable here.
- antistatic agents for example fatty acid esters such as glycerol monostearate or ethoxylated fatty amines or alkylamines
- lubricant can be added to the core component and / or shell, if the already existing proportion of the copolymer is insufficient.
- the copolymer of the sheath component can be blended with homo-polypropylene.
- the viscosity of these mixtures is less than the viscosity of a homopolypropylene.
- a homo-polypropylene is used in the first or in the second embodiment of the invention, it is preferably a homo-polypropylene with the following properties.
- the melt flow rate (MFI) is suitably 17 to 37 g / 10 min, preferably 19 to 35 g / 10 min.
- the homo-polypropylene is recommended to have a narrow molecular weight distribution in the range of 3.6 to 5.2, in particular in the range of 3.8 to 5 on. The measurement of the molecular weight distribution has already been specified above.
- At least one of the following products is used as homo-polypropylene: Borealis HF420FB (MFI19), HG455FB (MFI25), HG475FB (MFI25), Basell Moplen HP561R (MFI25) and Exxon 3155 PP (MFI35).
- homopolypropylene and / or polypropylene copolymer in particular ethylene-propylene copolymer, is used both for the core component and for the shell component.
- the PP materials have proven particularly useful in the context of the invention.
- a spunbonded according to the invention is produced by a spunbond process.
- first multicomponent filaments or bicomponent filaments with core-sheath configuration are wound as endless filaments by means of at least one spinnerette and then these endless filaments are cooled in at least one cooling device and then the endless filaments pass through a stretching device for drawing the filaments.
- the drawn filaments are deposited on a tray, in particular on a Ablagesiebband as spunbonded.
- a particularly recommended embodiment of the invention in this context is characterized in that the unit of the cooling device and the drafting device is designed as a closed unit, wherein apart from the supply of cooling air in the cooling device takes place no further air supply into the closed unit.
- This closed embodiment has proven particularly useful in the context of the invention in the production of a spunbonded fabric according to the invention.
- At least one diffuser is arranged between the stretching device and the tray or the Ablagesiebband.
- the continuous filaments emerging from the drawing device are passed through this diffuser and then deposited on the tray or on the filing screen belt.
- a recommended embodiment variant of the invention is characterized in that at least two diffusers, preferably two diffusers in the filament flow direction, are arranged one behind the other between the drawing device and the tray. Conveniently, between the two diffusers
- At least one Sekundär Kunststoffeinthttsspalt for the entry of ambient air available.
- the embodiment with the at least one diffuser or with the at least two diffusers and the secondary air inlet gap has also proven particularly suitable with regard to the production of the spunbonded nonwovens according to the invention.
- the preconsolidation or solidification of the spunbonded fabric expediently takes place with at least one calender.
- two interacting calender rolls are preferably used.
- at least one of these calender rolls is designed to be heated.
- the embossing surface of the calender is expediently 8 to 20%, for example 12%. If, in the context of the invention, the degree of softness in a spunbonded nonwoven according to the invention is determined on the one hand and in a comparative nonwoven on the other hand, the same preconsolidation or solidification of the spunbonded nonwoven takes place in both nonwovens.
- the invention is based on the finding that the spunbonded nonwovens according to the invention have an optimally smooth, soft feel and nonetheless high strength. This results in soft spunbonded nonwovens with good tensile strength. This is especially true for the preferred use of the polypropylene or polypropylene copolymers for the core component and / or shell component of the continuous filaments of the spunbonded nonwoven according to the invention. It is also essential that, compared to known solutions, the evaporation of lubricant from the filaments can be effectively reduced, thereby avoiding undesirable deposits in the system. Thus, the cleanliness of the system compared to the known measures can be increased, thereby increasing the efficiency and availability of the system
- the invention is also based on the finding that an inhomogeneous introduction of the lubricant into the filaments effectively contributes to the solution of the technical problem according to the invention.
- a comparable strength of the nonwovens can be achieved in comparison to the measures known from practice in the production of the spunbonded nonwovens according to the invention and in particular during the consolidation of the spunbonded nonwovens at lower energy consumption become. Due to the high strength of the spun nonwovens achieved according to the invention, material can also be saved in the production of the endless filaments, in particular in comparison to other combinations of raw materials, such as PP / PE.
- Homo-polypropylene monocomponent filaments (Borealis HG455FB with MFI25) were prepared. The calendering was carried out at a surface temperature of the calender rolls of about 148 ° C. The spunbonded web produced has good strength, but in comparison to the following embodiments, but no satisfactory soft grip.
- a spunbonded bicomponent filaments was produced according to the first embodiment of the invention, wherein both the core component and the jacket component of homo-polypropylene (Borealis HG455FB MFI25) with 8% of a polypropylene Idemitsu "L-MODU X901 S" as a soft additive
- the mass ratio between the core component and the sheath component was 70:30 and contained exclusively in the core was the lubricant based on erucic acid amide SL05068PP from the company Constab.
- the content of the lubricant was 2000 ppm relative to the entire filament calendered at a surface temperature of the calender rolls of about 142 ° C.
- the spunbonded nonwoven fabric produced from these endless filaments had a smooth, soft feel after one day of deposition time.
- the spunbonded fabric of this embodiment was produced according to the first embodiment of the invention.
- the bicomponent filaments of this spunbonded fabric contained homopolypropylene (Basell Moplen HP561 R with MFI25) both in the core component and in the shell component
- the bicomponent filaments contained homo-polypropylene (Borealis HG475FB) in the core and polypropylene copolymer (Basell Moplen RP248R with MFI 30) in the shell.
- the mass ratio between the core component and the shell component was 70:30.
- the polypropylene copolymer of the shell contains a nucleating agent and an antistatic agent.
- the calendering of the spunbonded fabric took place at a surface temperature of the calender rolls of 121.degree.
- the handle of the produced spunbonded fabric had initially to be classified as blunt, after a day of storage, a smooth, soft feel of the fleece was established. This in turn shows a delayed migration of the lubricant or antistatic here.
- Embodiment 4 Embodiment 4
- the spunbonded fabric was produced according to the second embodiment of the invention.
- the core component of the bicomponent filaments was homo-polypropylene (Borealis HG475FW with MFI25) and the sheath component was polypropylene copolymer (Basell Moplen RP248R with MFI30).
- the mass ratio between the core component and the cladding component was 50:50.
- the polypropylene copolymer contained a nucleating agent and an antistatic agent.
- the solidification was carried out with calender rolls with a surface temperature of 121 ° C.
- the handle of the spunbonded fabric was initially dull and after a day's storage time then turned a smooth, soft handle. This again shows the delayed migration of the stearate used as lubricant.
- there is a reduced strength of the nonwoven fabric see Table below, which is due to the larger proportion of polypropylene copolymer compared to the homo-polypropylene.
- Embodiment 5 is a diagrammatic representation of Embodiment 5:
- the bicomponent filaments of this spunbonded fabric had homo-polypropylene (Borealis HG475FB with MFI25) in the core and polypropylene copolymer in the shell.
- the mass ratio of the core component to the shell component was 70:30.
- the polypropylene copolymer used is comparable to the copolymer Moplen RP248R, but has no nucleating agent and no antistatic agent.
- Hardening of the spunbonded web was carried out with calender rolls having a surface temperature of 121 ° C. Even after three-day storage time, the spunbonded fabric produced in this way did not reach the smooth, soft feel of embodiment 3. This shows that the use of polypropylene copolymer alone is not sufficient and a migrating lubricant is required for realizing the properties according to the invention.
- the following table gives the basis weights of the spunbonded nonwovens in g / m 2 and the machine direction (MD) and cross machine direction (CD) strengths, in N / 5 cm for the above examples.
- the strengths were determined according to EDANA ERT 20.2-89 with 100 mm clamping
- Comparative example V is compared here with exemplary embodiments 1 to 5:
- the spunbonded nonwovens of the embodiments 3 to 5 were solidified at a significantly lower calender than in Comparative Example V. Nevertheless, comparable strengths are observed, so that the energy expenditure in the production of spunbonded nonwoven fabric according to embodiments 3 to 5 could be reduced.
- the lower calendering temperature supports the soft grip and thus allows a reduction in the additional lubricant to be added.
- Embodiment 6 is a diagrammatic representation of Embodiment 6
- This embodiment relates to the difference in the degree of hardness or in relation to the hardness measurements listed. Measurements of the degree of hardness were carried out on a spunbonded fabric S1 according to the invention and on a comparative nonwoven fabric V1 with a commercially available measuring device TSA (Tissue Softness Analyzer) from Emtec, Leipzig, Germany. The measuring method has already been explained above. The measuring head was pressed onto the nonwoven surface with a force of 100 mN. It was measured here on the spunbonded surface facing away from the filing screen belt. The measuring head
- the spunbonded nonwoven according to the invention and, for the comparative nonwoven, a respective volume / frequency spectrum were recorded with the measuring device and the volume of the peak maximum (TS7 value) at 6550 Hz was determined therein. In each case 5 individual measurements were averaged.
- the two spunbond webs were made with the same spunbond apparatus, pre-consolidated in the same manner (ie, under the same conditions of calender consolidation), and both spunbonded webs had filaments of the same denier of 1.8 denier.
- the difference between the filaments of the two spunbonded nonwovens was the distribution of the lubricant in the polymer melt as it exited the spinning plate before spinning to the respective filament.
- the filaments consisted of a homogeneous mixture of homo-polypropylene and polypropylene copolymer.
- the raw materials for the bicomponent filaments were selected analogously to Example 2 above, the lubricant proportion based on the total filament was 2000 ppm and a calender engraving "U2888" with a 19% area fraction was used Corresponding to the core component of the bicomponent filaments, 4,000 ppm of lubricant were metered in.
- Comparative nonwoven V1 was spun with filaments of the same components, but the lubricant was homogeneously distributed over the filament cross section at 2000 ppm
- Non-wovens S1 and V1 were determined for the volume values (TS7 values) for three time points, namely 15 minutes, 2 hours and 96 hours after the filaments had been deposited on a stocking belt Volume values for the spunbonded fabric S1 according to the invention and for the comparative nonwoven fabric V1 yourself from the following table e:
- the single figure shows the volume values TS7 (in dBV 2 rms) of the peak maximum at 6550 Hz as a function of the time of measurement.
- the TS7 value is displayed, which was determined 15 minutes after the filament deposit, and to the right is the TS7 value, which was determined 2 hours after the filament deposit.
- the TS7 value which was determined 4 days or 96 hours after filament storage.
- the solid line characterizes the TS7 values for the spunbonded fabric S1 according to the invention and the dashed line shows the TS7 values for the comparative nonwoven fabric V1.
- the spunbonded fabric S1 according to the invention initially (after 15 minutes and after 2 hours) has a significantly higher volume level and thus a lower degree of softness or higher degree of hardness than the comparative nonwoven fabric V1.
- the comparison fleece however, there is a relatively rapid migration, so that here already relatively high degrees of softness or low degrees of hardness can be achieved.
- the increase in the curve between 15 minutes and 2 hours for both spunbonded fabrics is explained by the first postcrystallization of the polypropylene blend which stiffens the filaments. This shape of the curves may be considered typical of this combination of raw materials.
- both migration of the lubricant and post-crystallization simultaneously affect softness. Because migration speeds also depend on the
- the delayed migration of the lubricant to the filament surface in the spunbonded nonwovens according to the invention has the advantage that in the course of the production of the filaments a significantly lower outgassing of lubricants from the filaments takes place and thus the system components are correspondingly less polluted. At the same time, the winding behavior is positively influenced.
- the volume value of the spunbonded fabric according to the invention is more than 3% higher than the volume value of the comparative nonwoven fabric V1 within the first 150 minutes after the filament deposition, and the degree of firmness of the spunbonded fabric S1 according to the invention is correspondingly higher than 3% higher than the degree of hardness of the reference web V1. It can also be seen that the finished spunbonded fabrics have become softer, independent of any subsequent post-crystallization, which proves the effect and meaning of the lubricant.
- the raw material combination was chosen according to Embodiment 5, but with a lubricant.
- the core used was a homopolypropylene Moplen HP561 R and the sheath used the random CoPP with MFR 30 from Example 5.
- a core-sheath ratio of 70:30 was set and the same calender temperature was used as in the exemplary embodiment 6.
- 2900 ppm of lubricant were metered in only in the core.
- fleece V2 in each case 2,000 ppm of lubricant were added both in the core and in the sheath.
- the deposited spunbonded fabric is softer (lower in TS7 value) than the newly produced spunbonded fabric.
- the following table shows the TS7 relation of spunbonded fabrics S according to the invention to comparative nonwovens V (embodiments 6 and 7) after 15 minutes, 2 hours and 96 hours, and the strength values after production and the basis weights of the spunbonded nonwovens. Strengths and basis weights were determined according to the methods described above, using a peel rate of 200 mm / min for the strength measurement.
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Nonwoven Fabrics (AREA)
- Multicomponent Fibers (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
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Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
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MYPI2018703978A MY189928A (en) | 2016-05-18 | 2017-05-17 | Nonwoven spunbonded of continuous filaments |
CN202110345284.8A CN113062050B (en) | 2016-05-18 | 2017-05-17 | Spunbond nonwoven fabric made from continuous filaments |
MX2018012969A MX371463B (en) | 2016-05-18 | 2017-05-17 | Spunbonded fabric of endless filaments. |
JP2018557838A JP6728397B2 (en) | 2016-05-18 | 2017-05-17 | Spunbond nonwoven fabric made of endless filament |
BR112018072335-5A BR112018072335A2 (en) | 2016-05-18 | 2017-05-17 | nonwoven continuous spinning fabric made of continuous filament |
CN201780028188.2A CN109154117B (en) | 2016-05-18 | 2017-05-17 | Spunbond nonwoven fabric made from continuous filaments |
KR1020217018049A KR102396246B1 (en) | 2016-05-18 | 2017-05-17 | Spunbonded fabric of endless filaments |
KR1020187036772A KR102335064B1 (en) | 2016-05-18 | 2017-05-17 | Continuous Filament Spunbonded Nonwovens |
US16/084,048 US11788208B2 (en) | 2016-05-18 | 2017-05-17 | Continuous-filament spunbond |
ZA2018/06891A ZA201806891B (en) | 2016-05-18 | 2018-10-16 | Nonwoven spunbonded continuous filaments |
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DE102016109115.4 | 2016-05-18 | ||
DE102016109115.4A DE102016109115A1 (en) | 2016-05-18 | 2016-05-18 | Spunbonded nonwoven made of continuous filaments |
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WO2017198730A1 true WO2017198730A1 (en) | 2017-11-23 |
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PCT/EP2017/061877 WO2017198730A1 (en) | 2016-05-18 | 2017-05-17 | Spunbonded fabric of endless filaments |
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US (1) | US11788208B2 (en) |
EP (3) | EP3296438B1 (en) |
JP (4) | JP6728397B2 (en) |
KR (2) | KR102335064B1 (en) |
CN (2) | CN113062050B (en) |
AR (1) | AR110601A1 (en) |
BR (1) | BR112018072335A2 (en) |
DE (1) | DE102016109115A1 (en) |
DK (3) | DK3296438T3 (en) |
ES (3) | ES2751134T3 (en) |
MX (1) | MX371463B (en) |
MY (1) | MY189928A (en) |
PL (3) | PL3246447T3 (en) |
WO (1) | WO2017198730A1 (en) |
ZA (2) | ZA201806891B (en) |
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PL3771764T3 (en) * | 2019-07-30 | 2022-05-23 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Method and device for producing a nonwoven fabric |
EP3771761B1 (en) * | 2019-07-30 | 2021-05-19 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Spunbond nonwoven fabric made from endless filaments and device for producing spunbond nonwoven fabric |
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- 2017-05-17 EP EP19177272.2A patent/EP3569753B1/en active Active
- 2017-05-17 KR KR1020187036772A patent/KR102335064B1/en active IP Right Grant
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2020
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